Stir Casting Routes for Processing Metal Matrix Syntactic Foams: A Scoping Review

• Tipo: Artigo em Revista Científica Internacional
• Data: 2022

Autores

de la Muela, AMS (Autor) Outra; Duarte, J (Autor) FEUP; João Santos Baptista (Autor) FEUP; Cambronero, LEG (Autor) Outra; Ruiz-Roman, JM (Autor) Outra; Elorza, FJ (Autor) Outra

Revista

A Revista está pendente de validação pelos Serviços Administrativos.

Título: PROCESSES

Vol. 10

Página Final: 478

ISSN: 2227-9717

Indexação

ISI Web of Knowledge - 0 Citações

ISI Web of Science

Scopus - 0 Citações

Classificação Científica

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia mecânica > Metalurgia

FOS: Ciências da engenharia e tecnologias > Engenharia dos materiais

Outras Informações

ID Authenticus: P-00W-6FH

DOI: 10.3390/pr10030478

Abstract (EN): Metal matrix syntactic foams (MMSFs) are advanced lightweight materials constituted by a metallic matrix and a dispersion of hollow/porous fillers. Physical and mechanical properties can be fitted regarding matrix and filler properties and processing parameters. Their properties make them potential materials for sectors where density is a limiting parameter, such as transport, marine, defense, aerospace, and engineering applications. MMSFs are mainly manufactured by powder metallurgy, infiltration, and stir casting techniques. This study focuses on the current stir casting approaches and on the advances and deficiencies, providing processing parameters and comparative analyses on porosity and mechanical properties. PRISMA approaches were followed to favor traceability and reproducibility of the study. Stir casting techniques are low-cost, industrially scalable approaches, but they exhibit critical limitations: buoyancy of fillers, corrosion of processing equipment, premature solidification of molten metal during mixing, cracking of fillers, heterogeneous distribution, and limited incorporation of fillers. Six different approaches were identified; four focus on limiting buoyancy, cracking, heterogeneous distribution of fillers, and excessive oxidation of sensitive matrix alloys to oxygen. These improvements favor reaching the maximum porosity of 54%, increasing the fillers' size from a few microns to 4-5 mm, reducing residual porosity by +/- 4%, synthesizing bimodal MMSFs, and reaching maximum incorporation of 74 vol%.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 24